This author has not been identified. Look up 'Viet-Hung Dang' in GoogleThis author has not been identified. Look up 'Hoang Huu Viet' in GoogleThis author has not been identified. Look up 'Nguyen Duc Thang' in GoogleThis author has not been identified. Look up 'Ngo Anh Vien' in GoogleThis author has not been identified. Look up 'Le Anh Tuan 0002' in Google